2 * linux/drivers/video/omap2/dss/display.c
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 * Some code and ideas taken from drivers/video/omap/ driver
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
23 #define DSS_SUBSYS_NAME "DISPLAY"
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/jiffies.h>
28 #include <linux/platform_device.h>
30 #include <video/omapdss.h>
33 static ssize_t display_enabled_show(struct device *dev,
34 struct device_attribute *attr, char *buf)
36 struct omap_dss_device *dssdev = to_dss_device(dev);
37 bool enabled = dssdev->state != OMAP_DSS_DISPLAY_DISABLED;
39 return snprintf(buf, PAGE_SIZE, "%d\n", enabled);
42 static ssize_t display_enabled_store(struct device *dev,
43 struct device_attribute *attr,
44 const char *buf, size_t size)
46 struct omap_dss_device *dssdev = to_dss_device(dev);
49 r = kstrtoint(buf, 0, &enabled);
55 if (enabled != (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)) {
57 r = dssdev->driver->enable(dssdev);
61 dssdev->driver->disable(dssdev);
68 static ssize_t display_upd_mode_show(struct device *dev,
69 struct device_attribute *attr, char *buf)
71 struct omap_dss_device *dssdev = to_dss_device(dev);
72 enum omap_dss_update_mode mode = OMAP_DSS_UPDATE_AUTO;
73 if (dssdev->driver->get_update_mode)
74 mode = dssdev->driver->get_update_mode(dssdev);
75 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
78 static ssize_t display_upd_mode_store(struct device *dev,
79 struct device_attribute *attr,
80 const char *buf, size_t size)
82 struct omap_dss_device *dssdev = to_dss_device(dev);
84 enum omap_dss_update_mode mode;
86 if (!dssdev->driver->set_update_mode)
89 r = kstrtoint(buf, 0, &val);
94 case OMAP_DSS_UPDATE_DISABLED:
95 case OMAP_DSS_UPDATE_AUTO:
96 case OMAP_DSS_UPDATE_MANUAL:
97 mode = (enum omap_dss_update_mode)val;
103 r = dssdev->driver->set_update_mode(dssdev, mode);
110 static ssize_t display_tear_show(struct device *dev,
111 struct device_attribute *attr, char *buf)
113 struct omap_dss_device *dssdev = to_dss_device(dev);
114 return snprintf(buf, PAGE_SIZE, "%d\n",
115 dssdev->driver->get_te ?
116 dssdev->driver->get_te(dssdev) : 0);
119 static ssize_t display_tear_store(struct device *dev,
120 struct device_attribute *attr, const char *buf, size_t size)
122 struct omap_dss_device *dssdev = to_dss_device(dev);
125 if (!dssdev->driver->enable_te || !dssdev->driver->get_te)
128 r = kstrtoint(buf, 0, &te);
134 r = dssdev->driver->enable_te(dssdev, te);
141 static ssize_t display_timings_show(struct device *dev,
142 struct device_attribute *attr, char *buf)
144 struct omap_dss_device *dssdev = to_dss_device(dev);
145 struct omap_video_timings t;
147 if (!dssdev->driver->get_timings)
150 dssdev->driver->get_timings(dssdev, &t);
152 return snprintf(buf, PAGE_SIZE, "%u,%u/%u/%u/%u,%u/%u/%u/%u\n",
154 t.x_res, t.hfp, t.hbp, t.hsw,
155 t.y_res, t.vfp, t.vbp, t.vsw);
158 static ssize_t display_timings_store(struct device *dev,
159 struct device_attribute *attr, const char *buf, size_t size)
161 struct omap_dss_device *dssdev = to_dss_device(dev);
162 struct omap_video_timings t;
165 if (!dssdev->driver->set_timings || !dssdev->driver->check_timings)
169 #ifdef CONFIG_OMAP2_DSS_VENC
170 if (strncmp("pal", buf, 3) == 0) {
171 t = omap_dss_pal_timings;
173 } else if (strncmp("ntsc", buf, 4) == 0) {
174 t = omap_dss_ntsc_timings;
178 if (!found && sscanf(buf, "%u,%hu/%hu/%hu/%hu,%hu/%hu/%hu/%hu",
180 &t.x_res, &t.hfp, &t.hbp, &t.hsw,
181 &t.y_res, &t.vfp, &t.vbp, &t.vsw) != 9)
184 r = dssdev->driver->check_timings(dssdev, &t);
188 dssdev->driver->set_timings(dssdev, &t);
193 static ssize_t display_rotate_show(struct device *dev,
194 struct device_attribute *attr, char *buf)
196 struct omap_dss_device *dssdev = to_dss_device(dev);
198 if (!dssdev->driver->get_rotate)
200 rotate = dssdev->driver->get_rotate(dssdev);
201 return snprintf(buf, PAGE_SIZE, "%u\n", rotate);
204 static ssize_t display_rotate_store(struct device *dev,
205 struct device_attribute *attr, const char *buf, size_t size)
207 struct omap_dss_device *dssdev = to_dss_device(dev);
210 if (!dssdev->driver->set_rotate || !dssdev->driver->get_rotate)
213 r = kstrtoint(buf, 0, &rot);
217 r = dssdev->driver->set_rotate(dssdev, rot);
224 static ssize_t display_mirror_show(struct device *dev,
225 struct device_attribute *attr, char *buf)
227 struct omap_dss_device *dssdev = to_dss_device(dev);
229 if (!dssdev->driver->get_mirror)
231 mirror = dssdev->driver->get_mirror(dssdev);
232 return snprintf(buf, PAGE_SIZE, "%u\n", mirror);
235 static ssize_t display_mirror_store(struct device *dev,
236 struct device_attribute *attr, const char *buf, size_t size)
238 struct omap_dss_device *dssdev = to_dss_device(dev);
241 if (!dssdev->driver->set_mirror || !dssdev->driver->get_mirror)
244 r = kstrtoint(buf, 0, &mirror);
250 r = dssdev->driver->set_mirror(dssdev, mirror);
257 static ssize_t display_wss_show(struct device *dev,
258 struct device_attribute *attr, char *buf)
260 struct omap_dss_device *dssdev = to_dss_device(dev);
263 if (!dssdev->driver->get_wss)
266 wss = dssdev->driver->get_wss(dssdev);
268 return snprintf(buf, PAGE_SIZE, "0x%05x\n", wss);
271 static ssize_t display_wss_store(struct device *dev,
272 struct device_attribute *attr, const char *buf, size_t size)
274 struct omap_dss_device *dssdev = to_dss_device(dev);
278 if (!dssdev->driver->get_wss || !dssdev->driver->set_wss)
281 r = kstrtou32(buf, 0, &wss);
288 r = dssdev->driver->set_wss(dssdev, wss);
295 static DEVICE_ATTR(enabled, S_IRUGO|S_IWUSR,
296 display_enabled_show, display_enabled_store);
297 static DEVICE_ATTR(update_mode, S_IRUGO|S_IWUSR,
298 display_upd_mode_show, display_upd_mode_store);
299 static DEVICE_ATTR(tear_elim, S_IRUGO|S_IWUSR,
300 display_tear_show, display_tear_store);
301 static DEVICE_ATTR(timings, S_IRUGO|S_IWUSR,
302 display_timings_show, display_timings_store);
303 static DEVICE_ATTR(rotate, S_IRUGO|S_IWUSR,
304 display_rotate_show, display_rotate_store);
305 static DEVICE_ATTR(mirror, S_IRUGO|S_IWUSR,
306 display_mirror_show, display_mirror_store);
307 static DEVICE_ATTR(wss, S_IRUGO|S_IWUSR,
308 display_wss_show, display_wss_store);
310 static struct device_attribute *display_sysfs_attrs[] = {
312 &dev_attr_update_mode,
321 void omapdss_default_get_resolution(struct omap_dss_device *dssdev,
322 u16 *xres, u16 *yres)
324 *xres = dssdev->panel.timings.x_res;
325 *yres = dssdev->panel.timings.y_res;
327 EXPORT_SYMBOL(omapdss_default_get_resolution);
329 void default_get_overlay_fifo_thresholds(enum omap_plane plane,
330 u32 fifo_size, enum omap_burst_size *burst_size,
331 u32 *fifo_low, u32 *fifo_high)
333 unsigned burst_size_bytes;
335 *burst_size = OMAP_DSS_BURST_16x32;
336 burst_size_bytes = 16 * 32 / 8;
338 *fifo_high = fifo_size - 1;
339 *fifo_low = fifo_size - burst_size_bytes;
342 int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev)
344 switch (dssdev->type) {
345 case OMAP_DISPLAY_TYPE_DPI:
346 if (dssdev->phy.dpi.data_lines == 24)
351 case OMAP_DISPLAY_TYPE_DBI:
352 case OMAP_DISPLAY_TYPE_DSI:
353 if (dssdev->ctrl.pixel_size == 24)
357 case OMAP_DISPLAY_TYPE_VENC:
358 case OMAP_DISPLAY_TYPE_SDI:
359 case OMAP_DISPLAY_TYPE_HDMI:
365 EXPORT_SYMBOL(omapdss_default_get_recommended_bpp);
367 /* Checks if replication logic should be used. Only use for active matrix,
368 * when overlay is in RGB12U or RGB16 mode, and LCD interface is
370 bool dss_use_replication(struct omap_dss_device *dssdev,
371 enum omap_color_mode mode)
375 if (mode != OMAP_DSS_COLOR_RGB12U && mode != OMAP_DSS_COLOR_RGB16)
378 if (dssdev->type == OMAP_DISPLAY_TYPE_DPI &&
379 (dssdev->panel.config & OMAP_DSS_LCD_TFT) == 0)
382 switch (dssdev->type) {
383 case OMAP_DISPLAY_TYPE_DPI:
384 bpp = dssdev->phy.dpi.data_lines;
386 case OMAP_DISPLAY_TYPE_HDMI:
387 case OMAP_DISPLAY_TYPE_VENC:
388 case OMAP_DISPLAY_TYPE_SDI:
391 case OMAP_DISPLAY_TYPE_DBI:
392 case OMAP_DISPLAY_TYPE_DSI:
393 bpp = dssdev->ctrl.pixel_size;
402 void dss_init_device(struct platform_device *pdev,
403 struct omap_dss_device *dssdev)
405 struct device_attribute *attr;
409 switch (dssdev->type) {
410 #ifdef CONFIG_OMAP2_DSS_DPI
411 case OMAP_DISPLAY_TYPE_DPI:
412 r = dpi_init_display(dssdev);
415 #ifdef CONFIG_OMAP2_DSS_RFBI
416 case OMAP_DISPLAY_TYPE_DBI:
417 r = rfbi_init_display(dssdev);
420 #ifdef CONFIG_OMAP2_DSS_VENC
421 case OMAP_DISPLAY_TYPE_VENC:
422 r = venc_init_display(dssdev);
425 #ifdef CONFIG_OMAP2_DSS_SDI
426 case OMAP_DISPLAY_TYPE_SDI:
427 r = sdi_init_display(dssdev);
430 #ifdef CONFIG_OMAP2_DSS_DSI
431 case OMAP_DISPLAY_TYPE_DSI:
432 r = dsi_init_display(dssdev);
435 case OMAP_DISPLAY_TYPE_HDMI:
436 r = hdmi_init_display(dssdev);
439 DSSERR("Support for display '%s' not compiled in.\n",
445 DSSERR("failed to init display %s\n", dssdev->name);
449 /* create device sysfs files */
451 while ((attr = display_sysfs_attrs[i++]) != NULL) {
452 r = device_create_file(&dssdev->dev, attr);
454 DSSERR("failed to create sysfs file\n");
457 /* create display? sysfs links */
458 r = sysfs_create_link(&pdev->dev.kobj, &dssdev->dev.kobj,
459 dev_name(&dssdev->dev));
461 DSSERR("failed to create sysfs display link\n");
464 void dss_uninit_device(struct platform_device *pdev,
465 struct omap_dss_device *dssdev)
467 struct device_attribute *attr;
470 sysfs_remove_link(&pdev->dev.kobj, dev_name(&dssdev->dev));
472 while ((attr = display_sysfs_attrs[i++]) != NULL)
473 device_remove_file(&dssdev->dev, attr);
476 dssdev->manager->unset_device(dssdev->manager);
479 static int dss_suspend_device(struct device *dev, void *data)
482 struct omap_dss_device *dssdev = to_dss_device(dev);
484 if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
485 dssdev->activate_after_resume = false;
489 if (!dssdev->driver->suspend) {
490 DSSERR("display '%s' doesn't implement suspend\n",
495 r = dssdev->driver->suspend(dssdev);
499 dssdev->activate_after_resume = true;
504 int dss_suspend_all_devices(void)
507 struct bus_type *bus = dss_get_bus();
509 r = bus_for_each_dev(bus, NULL, NULL, dss_suspend_device);
511 /* resume all displays that were suspended */
512 dss_resume_all_devices();
519 static int dss_resume_device(struct device *dev, void *data)
522 struct omap_dss_device *dssdev = to_dss_device(dev);
524 if (dssdev->activate_after_resume && dssdev->driver->resume) {
525 r = dssdev->driver->resume(dssdev);
530 dssdev->activate_after_resume = false;
535 int dss_resume_all_devices(void)
537 struct bus_type *bus = dss_get_bus();
539 return bus_for_each_dev(bus, NULL, NULL, dss_resume_device);
542 static int dss_disable_device(struct device *dev, void *data)
544 struct omap_dss_device *dssdev = to_dss_device(dev);
546 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
547 dssdev->driver->disable(dssdev);
552 void dss_disable_all_devices(void)
554 struct bus_type *bus = dss_get_bus();
555 bus_for_each_dev(bus, NULL, NULL, dss_disable_device);
559 void omap_dss_get_device(struct omap_dss_device *dssdev)
561 get_device(&dssdev->dev);
563 EXPORT_SYMBOL(omap_dss_get_device);
565 void omap_dss_put_device(struct omap_dss_device *dssdev)
567 put_device(&dssdev->dev);
569 EXPORT_SYMBOL(omap_dss_put_device);
571 /* ref count of the found device is incremented. ref count
572 * of from-device is decremented. */
573 struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from)
576 struct device *dev_start = NULL;
577 struct omap_dss_device *dssdev = NULL;
579 int match(struct device *dev, void *data)
585 dev_start = &from->dev;
586 dev = bus_find_device(dss_get_bus(), dev_start, NULL, match);
588 dssdev = to_dss_device(dev);
590 put_device(&from->dev);
594 EXPORT_SYMBOL(omap_dss_get_next_device);
596 struct omap_dss_device *omap_dss_find_device(void *data,
597 int (*match)(struct omap_dss_device *dssdev, void *data))
599 struct omap_dss_device *dssdev = NULL;
601 while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) {
602 if (match(dssdev, data))
608 EXPORT_SYMBOL(omap_dss_find_device);
610 int omap_dss_start_device(struct omap_dss_device *dssdev)
612 if (!dssdev->driver) {
613 DSSDBG("no driver\n");
617 if (!try_module_get(dssdev->dev.driver->owner)) {
623 EXPORT_SYMBOL(omap_dss_start_device);
625 void omap_dss_stop_device(struct omap_dss_device *dssdev)
627 module_put(dssdev->dev.driver->owner);
629 EXPORT_SYMBOL(omap_dss_stop_device);